Lock-wire turnbuckle



W. MARTIN.

LOCK WIRE TURNBUCKLE. APPLqcATloN FILED JuNEI. 191s.

Patented Aug. 29, 1922.

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VJYAJILL MARTIN, 0F CLEVELAND, OHIOLASSIGNOR OF ONE-HALF `TO CUMMNGCOX..

LOCK-WIRE TURNB'UCKLE.

Application filed June 17,

T0 all vir/1.0m. t may concern.'

Be it known that l, llllra'rr MARTIN, a citizen of the United States,and a resident ot Cleveland, county ot Cuyahoga. State of @him haveinvented a new andvusetul lmprovement in Lock-lire Turnhuckles, of whichthe following is a specification, the principle of the invention beingherein. explained and the best mode in which l have contemplatedapplying` that principle. so as to distinguish it from other inventions.

The present invention relates to lock-wire turn-buckles for holding theends o'l' wire cables andthe like without soldering the same. It isparticularly adapted ttor use in securing" cables. such as are used inaeroplanes. and the device is adapted to be formed as one end of theusual turn-lnickle employed in such constructions.

The device combines light weight with strength and holding power and iseasy to install or replace. Then used cables may be changed readily andunder conditions in which they could not he soldered.

Figure l is a side elevation of my improved turn-buckle; Fig. 2 is acentral sec tion through the turn-buckle; Fig'. o is a side elevationpartially in section ot a modified form of turn-buckle; Figs. 4L and 5are sections taken on the lines lf-4land 5 5 ot Fig. 2, respectively;Figs. 6 and 7 are sections taken on the lines 6-6 and 7-7 of Fig. 3respectively.

The present device consists of a. chuck portion l having a slotted end 2provided with an aperture 3 adapted to receive a pin or other fastening`means to hold it to a bracket or clip. rlhe chuck is slotted centrally,the lower portion 4 ot the slot being' narrowed and provided withinclined concave grooves 5 terminating' in a double aperture 6 extendingthrough the lower end ot the chuck. The faces 7 of the slotted portionare flat and are provided with apertures 8 to lessen the weight. Theparticular outer form of the chuck is not essential and when used underconditions where light wei ,eht is not essential, the chuck willpreferably he lett with rounded taces and without the apertures tosimplify the manufacture and to lower the cost.

Below the inclined grooves 5. the chuck terminates in a cylindricalportion 9 which has an upper eXteriorly threaded portion 10 and anextending split end ll which istapered toward the end. The doubleaperture specification of Lenersratent. regt-tenta@ au@ 29 3922;',

1918. Serial No. 240,442.

k6 extends through the split end and over this end is mounted a sleevel2 which is in= teriorly threaded lat its upper end and is provided withfaces 13 adapted to be engaged by a wrench or the like. The sleeve isprovided with an inclined annular tace 14 at its lower portionterminatingin a centrally located aperture l5 of suilicient size to tthe cable 16. The inclined annular face 14- is adapted to contact withthe inclined outerv tace of the split portion of the chuck in order tosecurely grip the wires when the sleeve is threaded on to the threadedportion of the chuck.

The cable 16 is adapted to be inserted through the split sleeve and ismounted over a grooved hohbin 19. and is then threaded `downwardly againthough the sleeve. The

bobhin 19 is heart shaped and conforms to vthe angle ot the grooves inthe ychuck so that when the wires are clamped in the sleeveV tur-thermovement of the wire will wedge the bobbin and the cable firmly in theinclined grooves in the chuck and prevent further movement ot the same.

In the form shown in Fifi). 3 the threaded end 2O of the chuck is splitand has two apertures 2l. 22 opening` together. one of them larger thanthe other. The cable 23 is threaded through the sleeve and over thebobbin as in the other form, and extends down through the short end ofthe chuck, the stub end 24T ot the cable being held in the smaller one22 ot the two openings. This split threaded portion ot the chuck is coneshaped and threaded on its outer surtace. and is adapted to be engagedby a short sleeve 25 which will securely clamp the stub end ot the cablebetween the two halves of the chuck. Thus when any strain is put on thecable the stub end is firmly held and the cable will then move` slightlyuntil the bobbin 26 has wedged the two portions of the cable firmlyagainst the grooves in the chuck, holding' the same tightly againstmovement.

The form oit the present turn-buckle, as shown in Fig. 3, where theupper end of the chuck terminates in a threaded portion 27. is adaptedto be engaged by one end of an interiorly threaded turn-buckle 28carrying the usual outer end provided with the usual slotted end 29.Then in use it has been 'found that the long' sleeve shown in Figs. .land 2 is not essential and the device will hold the cable securely evenit the sleeve is not employed, the cable being wedged firmly against thetwo grooves in the chuck proper .All that is. neceal lbe made in varioussizes for different types of work, the size shown in Fig. 3 beingdesigned 'for aeroplane construction where light .weight is essential,vwhile the forms shown in Figs.' l and 2 will be used for heavier typesof cable where the weight is not so essential.

Other modes of applying the principle of my invention may be employedinstead of the one explained, change being madeas regards the `mechanismherein disclosed, pro vided the means stated by any of the followingclaims or the equivalent of such stated means be employed.

l therefore particularly point out and distinctly claim as my inventionv l. ln' a device of the character described, the combination of a chuckmember having va lower split portion provided with two cable receivingapertures, and a slotted upper portion having inclined ygrooves incommunication with such apertures, the exterior of .auch chuckL memberbeing apertured, and being provided at its lower end with a "cone shapedportion, and a clamping sleeve havingan interiorly threaded portionadapted to be threaded on the chuck member, said sleeve having an innerinclined annular face adapted to contact with said cone shaped portionof said chunk member to clamp the cable in such apertures.

2. In a device of the character described, the combination of a chuckmember having a lower split portion provided with two cable receivingapertures, and a slotted upper portion having inclined grooves incommunication with such apertures, the exterior of such chuck memberbeing apertured, a bobbin adapted to receive the cable .therearound andbeing pointed to wedge the cable in such igned by me, this 14th day ofJune, 1918.

WYATT MARTIN.

